A signal transmitting device includes a transmitting circuit block having a driving circuit connected to a main transmission line for driving a signal and an intra-block transmission line for transmitting a signal sent from the driving circuit to the main transmission line. The device also includes a receiving circuit block having a transmitting/receiving circuit connected to the main transmission line for receiving a signal inputted from said main transmission line and outputting the received signal to a next stage, an intra-block transmission line for transmitting a signal input from the main transmission line to the transmitting/receiving circuit, a receiving circuit for receiving an output signal from the transmitting/receiving circuit, and a next state intra-block transmission line to enable high-speed signal transmission, the main transmission line includes a termination resistor having s resistance equal to an impedance of the main transmission line and the intra-block transmission line includes an element having a resistance substantially equal to a value derived by subtracting a half of the impedance value of the main transmission line from an impedance value of the intra-block transmission line also, to improve transmission speed along the next-stage intra-block transmission line, a termination resistor is provided from the next-stage intra-block transmission line and the transmitting/receiving circuit and the next-stage intra-block transmission line to produce a voltage drop thereacross.